| 释义 |
profilograph|prəʊˈfiːləʊgrɑːf, -æ-|
[a. F. profilographe (so named by its inventor Dumoulin), f. profile n. + Gr. -γραϕ-ος writer, delineator: see -graph.]
A machine which traces mechanically the contour line of the ground over which it travels; = profilometer 2.
Exhibited at Paris Universal Exhibition 1855; the subject of Eng. Patent No. 1464, but not there named. See La Nature (1880) II. 31.
1890in Century Dict. 1941Jrnl. Amer. Ceramic Soc. XXIV. 229 The closest approach to this was a profilograph which had been constructed by Abbott at the University of Michigan and a somewhat similar device which had been built in Germany by Schmaltz. These instruments used a diamond stylus mechanically mounted on a mirror in such a way that movements of the diamond point in a direction normal to the surface of the material could be magnified by an optical lever system and the results recorded on a photographic film. 1963Engineering 20 Sept. 360/1 The Bump-cutter employs 110 12 in diameter saw blades impregnated with natural diamonds. The design principle is based on a profilograph with the cutting head mounted on a 16 ft long frame supported by drive wheels at the rear and steering wheels at the front. 1976Attewell & Farmer Princ. Engin. Geol. x. 751 Unless joint surfaces are sufficiently exposed..to lend themselves to profilograph examination, it is difficult to see how a reduction factor can be applied. |